Salts of the aurothiosulfuric acid and process of making same.



its salts, and may be illustrated V soluble in water and diflicultly soluble in al.-

To all III/10m. it may concern:

body as those claimed'in of ethylenediamin alcohol are added.

sulfur dlOXlll UNlTE STAES PATENT OFFICE. GUSTAV SPIESS AND ADOLF lilJLlJT, 0F FRANKFORT-ON-THE-MAIN. GERMANY, ASSIGN- QRS TO FAEBW'ERKE V'ORM. MEISTER LUC IUS 3: BRtl'NING, 0F HfiCHST ONTHE- MAIN, GER-MANY, A CORPORATION OF GERMANY.

SALTS 6F THE .AUBOTHIOSULFURIC ACID AND PROCESS OF MAKING SAME.

1 1 5 Specification of Letters Patent.

150 Drawing.

Pu tented Nov. 3, l9 Eel.

Application filed January 16, 1914. Serial No 812,577.

added a solution of surothiosulfntc in 50 cc. having allowed the mixture to stand for one hour. the barium sulfate which has sepurated is filtered oil and from. the filtrate the nuric doublosult precipitated by means Be, it lniown that we, GUSTAV Srrnss,i Ph. D1, professor of medicine, and Anon; FELIYL? Ph. ll, doctor of medicine, citizens of the Empires of Germany and Russia, re- 1 spectirely, residing at l ranlrfort on-the- I Main. tl rumny, have nvented pertain new of ubsolutc alcohol.- lfor puriifying' the salt, and uscml Improvements in cults or the it is dissolved in is little water as pos ibl .Aurothiosulfuric Acid and Processes of and precipitated with acetone. The pipers- Mukiug Home. of which the following is a Zlll-HIllOllllUSlllffltQ forms a colorless crvsspecification. tulhne powder which assumes a somewhat Patent-application Serf No. 812,575 led Jsntuiry 18, 191i is described the process of preparing" double-salts of gold-hydrocyunio acids with organic nitr0genous bases. Bi on We have found that in the place of the gold hydrocyunic acids these may ulso be used uurothiosulfuric acidor its salts. The products thus obtained possessfzhe some properties regarding" their so tion upon microorganisms in the animal.

the aforesaid U. S.

In {1, dark coloration at about 160" C. and, when heated to a higher tem eraturo, decomposes w1thout.prcriousuy melting. It is very rendily soluble in water; the percentage "of gold Elrample I]! :-2.2 grams of'hurium zu'uo thiosulfutienre dissolved in 15 cc. of Water {and mixed with 1 phenyl dimethylA-dimethylmuino-lipyrzlzolono sulfate in 25 cc. of water. The barium-sulfate which separates lit once is filtered oil and the Clall', coleless filtrate is evaporated to dryness. For removing from the residue the adhering oily substances, the mas. is pressed upon a. clay-slaw. llhe 1 p enyl 2.3 d'i nethyldiincthyluminoo pyrazolone uurothiosulfate nice. col- "orless crystals, melting at l(l5--10! C. It dissolves very readily in Water; the percent- ,uge of gold contained therein corresponds patent application.

The process "ofpreparing said new products consistsin treating the organic buses or their salts with aurothiosnlfuric acid or by the following examples:

Example I 1.5 grams of'tlie hydrochlorid and 3.7 grams of sodiiun surothiosulfotc are. dissolved each in 10 cc. of Water. The two solutions are mixed and after standing-for some time 200 cc. of absolute The yellowish crystal line mass which separates is pfurified die} to the formula: v solving it in a little quantity 0 Watef'u' 'cro- 9 1 upon the solution is filtered and precipitated UHMHIZMQHLAMSEQE) with absolute alcohol. If 'necessary,;thc Y Example IV: 2.2 purifying operation may be repeated The thiosulfute are dissolved in 25 cc. pure ethylenediomin aurothiosulfate forms and mixed with a solution of 2 grams of a white crystalline powder, very readily cholin-sulfute in 25 cc. oi? water. The he; rium sulfate which separates is filtered off and the filtrate is evaporated, as for as s of Water cohol. Its salt begins to turn yellow ht. about C. and when heated to a higher temperature decomposes with evolution of finally there remains pure gold. The preparation connains a percentuge of gold corresponding to the formula:

phorus p'entoxid, when a smallquantity of a crystalline body separates which is prob ably formed by decomposition during the evaporation], and whicli if insoluble in water. T A 4 The crystu s are care u lv filtered oil and glCHflCHBQHZlZlQlAUHASZOJQ] the clear, thin, oily liquid is mixed with In an analogous manner are prepared the much absolute alcohol. lVhen this mixture ziuro-thiosulfates: of other organic bases. is'rul'ibed for a considerable time a portion Emcmplc H: To a solution of 9.86 grams of the oily liquidv solidifies into a powof piperuzin-sulfute in 15 cc. of water is dered,wh1te mass which constitutes the new contained therein corresponds to the fore. solution of 3.5 grams ofsible, in a vucuum-oxsiccutor over phos grums of barium-curd wherein BN stands for an organic, nitrogenous base, and H,A11(S,O,) for the aurothiosulfuric acid, being colorless crystals, fldissolving in water Without decomposition, scarcely soluble in ether and benzene, and

decomposing, when heated, leaving metallic gold. v v

3. As a new product, the eurothiosulfste of 1 phenyl-2.3-dimethyL-dimethylaniine- 5-pyrszolone of the constitution:

aie u m a (82 8),,

being colorless crystals, readily dissolving in water without decomposition, scarcely solublevin ether and benzene and decomposing, when heated, leaving metallic gold.

.ln testimony whereof, we uffix our signatures in presence of two Witnesses.

GUSTAV senses.

* Anoer FELDT,

Witnesses JEAN GRUND, CARL GRUND. 

